JPH02249849A - Changing method of film roll - Google Patents

Abstract

PURPOSE:To smoothly change the roll go on by decreasing the extent of film tension just before film cutting, and cutting a film after making sure of sticking between the film and a core surface. CONSTITUTION:When positioning for a new core 12 and a cutter 14 is completed, a presser roller 20 is shifted to a full-line position from an illustrated dotted line by a cylinder, and thereby a film 10 is transferred to the full-line position from the two-dot chain line position. Then, it is pressed to the new core by the presser roller 20, and stuck to a new core surface with a binder and simultaneously it is cut by the cutter 14. At this time, pressing force of the presser roller 20 is relaxed by operation as long as 0.2-1.5 seconds or so of the cylinder, thus tension of the film 10 is decreased. Accordingly sticking to the new core 12 comes to secureness by a running state of the film 10 while cutting is also stably performable, thus a roll change can be done smoothly in keeping the film run intact.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention involves rolling a film made of a polymeric material such as a thermoplastic polyester film (hereinafter sometimes referred to as ware) into an a-le shape using a turret type winding device. It is related to the technology of hoisting. In particular, when the web is fully wound, the winding device is driven to avoid stopping the running web.
Concerning efficient roll exchange and winding technology for rewinding to new cores.

[Prior art and technical problems] When starting to wind a web made of a polymeric material around a core, it is necessary to fix the tip of the wear to the core surface.

In the conventional technology, glue is applied to the part of the core surface that should be fixed.

The wear and core are fixed by applying adhesive or pasting double-sided adhesive tape.

At this time, if the adhesive or double-sided adhesive tape partially forms a thick layer on the core surface, the garment wrapped around that area will have a difference in level compared to other areas without adhesive. For some reason, it is deformed (the step is transferred)
The transferred part cannot be used because it is stored away. Nowadays, there is a tendency for thinner ware to be used more frequently, and the thinner the ware is, the easier it is to undergo transfer (deformation), and there is the problem that the defective parts that are transferred and cannot be used extend over a long range, that is, it does not cause a decrease in yield. becomes. As a countermeasure against these problems, efforts have been made to minimize the unusable portion of the wear (see Japanese Utility Model Publication No. 311675/1983).

Further, once the web has been wound onto the core by a predetermined amount, it is re-wound onto another new core. Usually, the core is re-wound using a turret-type winding device that can wind the core with a plurality of turquoise arms. In cases such as mill roll slitting or rewinding, when replacing the O-ru, the running wear is temporarily stopped, the web is cut in the width direction, and the tip of the cut wear is fixed to the part of the new core that should be fixed. However, by subsequently driving the winding device again, rewinding is performed under conditions where there is almost no loss of wear when replacing the core.

However, when the process from melt forming to winding is carried out as a single unit, such as in film production, it is not preferable to stop the winding machine in order to wind up the running film when changing rolls. This is because even when the winding machine is stopped, the film forming equipment and stretching heat setting equipment are continuously driven.
Due to the film being stopped just in front of the winding device, the film that cannot be wound will accumulate as loss. In order to avoid this loss, a technique has been proposed in which a full roll is quickly replaced with a new core while the core is continuously running. For example, in Japanese Patent Application Laid-Open No. 58-125554, a linear adhesive is provided on the outer surface of a new core, and the adhesive is rotated in advance at a circumferential speed corresponding to the running speed of the web without contacting the wear. In advance, the cutting blade, which is separately fixed to the arm, is positioned close to the new core, and the wear is quickly brought into contact with the new core using a presser roller, and the moment the wear and the adhesive are fixed, A technique has been disclosed in which the wear roll is changed by cutting the wear over the entire width using the cutting blade.

When rewinding the web while it is still running, the tip of the cut web may be folded and wrapped around the new core, and this folded part should be covered with thick double-sided adhesive tape. As with the resulting web step, this results in unusable loss over long sections of the garment. Therefore, it is necessary to take measures to prevent folded portions of the wear from occurring when changing the rolls. The moment the web is fixed to the new core, if the garment can be instantly cut in the width direction by a cutting blade installed near the fixed position, the web tip will be in a substantially fixed state, and the folded It is assumed that the portion that can be used will disappear. However, in reality,
It is difficult to achieve such ideal conditions. In the technique disclosed in the above-mentioned Japanese Patent Application Laid-open No. 58-125554,
When the wear is UfAied to the double-sided adhesive tape (1 width strip) of the new core, if the wear tension is high, the adhesion will be incomplete and the web may not be able to deflect toward the cutting blade and not be cut. When the web roll width is 1000 seconds or less, such as a mill roll slit, it is possible to fix the web uniformly over the entire width. If the width of the web roll exceeds the width of the web roll, uniform fixation in the width direction becomes difficult. Furthermore, if the web cannot be instantly fixed to the new core over its entire width, there is a problem that the cutting will be incomplete, and the parts that are not fixed will break irregularly, and the web will tend to form cracks or fold.

[Technical Problems to be Solved] The present invention provides a means for smoothly performing cutting and switching when replacing the rolls of running continuous wear, which was uncertain in the prior art. The present invention also presents a technology in which the cuts of the web are aligned in the width direction, and there is no accumulation of folded ends of the garment when it is wound onto a roll.

[Specific solution] In the method of web winding, the present invention uses a turret type winder in particular to wind up a garment made of a polymeric material such as a polyester film into a roll around a core. When the web is fully wound, the web is cut in the width direction, the tip of the cut wear is wound around a new core, and then the roll is rolled up until the web is fully wound, facilitating roll changes. Relating to measures to be implemented.

Therefore, the present invention is a turret-type roll changing method in which a continuously running web is cut and re-wound onto a new core. The new core is provided with a linear adhesive on its outer surface and over substantially the entire length of its cylinder, and is pivotally attached to a predetermined position of the turret arm so that it can be attached to, detached from, and rotated freely.

This new core is positioned without coming into contact with the web, and then rotated at a circumferential speed that is substantially constant with the running speed of the web, in other words, the line speed of the winding device. Next, a cutting blade whose blade length extends in the width direction of the web and is at least the wear width is positioned near the core so that the blade is substantially parallel to the web.

The cutting blade is fixed to the arm, and is placed downstream of the core so as not to contact the wear or the core during positioning, so that it will come into contact with the cutting blade when the running direction of the web is deflected due to a change in tension. The position is close to the core where the core is cut. Immediately before the wear is cut by the cutting blade, the web comes into contact with the core, and the core and web are fixed to each other by an adhesive provided on the surface of the core. As a result, the cut end of the garment is wrapped around a new core without being folded.

The features of the present invention include the step of preparing a presser roller and first bringing the presser roller into contact with the wear, and the step of moving the presser roller immediately before cutting the web and bringing it into contact with a new core through the web. In the process of holding the web between the presser roller and the new core, the web is cut by the cutting blade almost at the same time as the web is fixed to the adhesive provided on the surface of the core.

A detailed explanation of the present invention is that the rolls of a continuously running web can be changed without stopping.

In particular, when the web is cut from the old core (web roll that has reached a spiral state) and can be wound and sewn onto the new core,
By operating it, you can smoothly change the eyes. In order for the cutting to occur reliably, the path of the web must be deflected. First, in the present invention, as a means for deflecting the running path of the web, a presser roller is prepared and set at C, and the presser roller is instantly moved to a new core, so that the web running in contact with the presser roller is moved to the new core. Change the driving route so that they touch each other. With this operation,
When the web contacts the new core, the adhesive on the surface of the core secures the web to the new core. In order to ensure this adhesion, it is important that the adhesion agent has a strong adhesion force, and in particular that the adhesion is uniform over the entire width of the web. In order to securely fix the garment, it is desirable that the tension of the garment be weakened so that the garment tension remains low only at the moment of fixation. Further, since the web must be fixed over its entire width, special measures are required when the web width is wide. For example, in the case of a wide width core, it is difficult for the center part of the width to be uniformly compressed by the presser roller, so the linear adhesive is used to bulge the center part and reduce the bending that is unique to wide widths. It is effective to do no correction. Similarly, it is preferable to provide the presser roller with a slight roundness in order to uniformly fix the web to the new core in the width direction. As another means, it would be effective to arrange the expander roller upstream and/or downstream of the new core (presser roller).

If the web can reliably adhere to the adhesive in the new core, failures in cutting the garment can be avoided. The web tension, which had been previously relaxed, increases as the garment adheres to the new core. This is due to the new core, which was spinning idle, rotating with wear.

Due to this increase in wear tension, the web collides with the cutting blade, and l;yJIgi is instantaneously caused. Furthermore, since the new core is rotating at the line speed of the winder, the wear tension reaches a predetermined value in a short time when the new core is wound.

11) Although the timing of reducing the wear tension is important, it is preferable to reduce the web tension 0.2 to 1.5 seconds before cutting the web. For web tensioning, a dancer roller is installed on the web travel path, and this dancer roller is moved rapidly to lower the tension. In addition, the web tension is adjusted by reducing the winding torque of the old core. There is also. Approximately 0.0% of the cutting by either means.
If the web tension is momentarily relaxed about 5 seconds before the wear is cut, the garment will deflect smoothly and stick to the new core, so that it will wrap around itself without folding as it is cut.

Further, as the fixing agent provided for fixing the web to the new core, a double-sided adhesive tape can be used in addition to a solid glue with a strong abrasive force, a water-soluble glue, and the like.

J: Sea urchin that allows the web to be cut in the width direction, the adhesive is preferably applied in a line across the entire width of the garment on the outer surface of the core.

Furthermore, the presser rollers perform an important function in changing the web travel path and fixing the web to the new core. This is done by using a means that allows the presser roller to rapidly move and press the new core, such as an air jack, hydraulic pressure, or the like.

Changing the running path of the web and changing the tension can be accomplished by a movable guide bar, a dancer roll, or a winder that can adjust (change) the winding torque as described above. Of course, entrainment airflow can be passed along the web to change the running of the web as well as to increase or decrease web tension. In the present invention, in addition to the web tension detection device, a device for adjusting the circumferential speed of the roller of the wear tension adjustment device 9 and the spring removal device is provided, and the timer can be operated to satisfy the above-mentioned timing. .

The present invention will be explained with reference to the drawings.

FIG. 1 is a flowchart showing the operation of the present invention. Further, FIG. 2 shows one embodiment of a winding device to which the method of the present invention can be applied.

As shown in Figure 1, program processing can be performed between the positioning of the new core and the cutting of the web. (1) Positioning of the new core (2) Positioning of the cutting blade (3) Prepare to guide the web to the new core, and bring it close to the core in conjunction with (4).

(4) Timer operation and time up (approximately 0 during this time)
．． 2-1.5 seconds) to reduce web tension.

(5) The web is fixed with a fixing agent on the core surface.

(6) Wear cutting There is a process.

Although omitted in the flowchart, as the web is cut, the web is wound around a new core, and the wear tension is restored to a steady value. The full core is also stopped for removal from the turret.

Figure 2 shows the winding S! 2 is a side view of the machine, showing a state in which the core has been positioned with a cutting blade 14 for cutting the web in order to rewind the web 10 onto a new core 12. An adhesive (not shown) is provided on the outer surface of the core so that when the web is pressed against the core by the holddown roller 20, the web is prepared to be secured by the adhesive on the core. The chain lines in the drawings show the web and the presser roller device when the web is not pressed by the presser roller, and the solid lines show the presser roller in operation.

The wear is made to travel from the left hand side in the drawing, and engages with a web tension detection roll, guide roll, expander roll, etc., and before being pressed by the presser roller, engages with the guide roll 22 and engages with the old core 11. are doing.

A presser roller provided on the arm pushes down the wear by operating a fluid cylinder to bring it into contact with the core 10, but at this time, the wear is pressed down on the downstream side of the expander roll.

Web presser bar 18. and is engaged with one guide roll and wound around the core 11.

Next, when the web adheres to the adhesive on the outer surface of the core, the travel path of the wear is deflected downward, and the web hits the cutting blade 14, causing the web to be cut.

In order to reliably cut the web, a timer is set to operate the fluid cylinder provided with the presser roller shown in Figure 1, and after a predetermined time (approximately 0.2 to 1.5 seconds), the tension is reduced to a predetermined low tension. Relax web tension.

In this low tension state, the web is reliably fixed to the core, and the web can be cut under stable conditions.

It goes without saying that the technology of the present invention also extends to devices that perform the operations.

[Effects of the Invention] According to the present invention, it is possible to smoothly switch the web wound up into a roll onto a core when changing the roll. In particular, the range of application has been expanded in that it can also be used for wide webs. In addition, since the ends of the cut web are aligned and short, it does not fold back and has a long winding leg, which is advantageous in terms of production yield (product loss). Furthermore, it has the advantage of being able to maintain a high overall operating rate and providing high quality film rolls.

[Example] The present invention will be further explained below with reference to Examples.

Polyethylene terephthalate was melt-extruded from a die, cooled with a cooling roll, and then longitudinally stretched to 3.6 times using a known stretching device, then horizontally stretched to 3.6 times, and the thickness after 2011 stretching was reduced to 15
It was set as μm. 3000 webs obtained in this way
．． Width at speed 200 TI'L/min winding tension 40
It was wound up in kg. A test was conducted in which the conventional method and the method of the present invention were used to cut the garment and wrap it around a new core. In the conventional method, the tension at the time of cutting the wear remains at 4089, whereas in the method of the present invention, the tension at 1
From the second minute, the tension was lowered to 5 or 9 and the cutting conditions were compared. The results are shown in the table below.

With the conventional method, the cutting condition was unstable, and test 1
The method of the present invention failed in 10 out of 00 attempts, whereas the method of the present invention succeeded in all cases.

In addition, in the conventional method, the uniformity in the width direction of the leading edge of the cutting tool was locally uneven, and the long part that was not cut in the longitudinal direction was folded, whereas the method of the present invention In this case, they were evenly aligned in the width direction and there were no folded parts.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing an embodiment of the method of the present invention]
It is. Further, FIG. 2 shows an embodiment of the apparatus of the present invention. In the drawings, 10 is a web (film). 11 is a fully wound core, 12 is a new core, 14 is a cutting blade,
20 is the presser foot row. Procedural amendment March 72, 1990

Claims (1)

[Scope of Claims] 1. A turret-type roll replacement method in which a continuously running film is cut and re-wound onto a new core, in which a new core is prepared with a bonding agent provided on its outer surface over substantially its entire length. Then, the core is positioned without touching the film, and then the core is rotated at a circumferential speed approximately equal to the running speed of the film, and a cutting blade whose blade length is longer than the full width of the film and which is fixed to the arm is cut. The core is positioned downstream of the rotating core so as not to come into contact with the film, and when the film is deflected, the film and the cutting blade come into contact, thereby cutting the film and cutting the cut film. In a method for cutting a film in which the leading end portion is wound around the core while being fixed by the adhesive of the core, the film tension is reduced immediately before the film is cut, and the film is connected to a holding roller and a new core. 1. A method for replacing a film roll, comprising: holding the film between the cores; and then cutting the film substantially at the same time as the film is fixed to the fixing agent of the core. 2. The method for replacing a film roll according to claim 1, wherein the timing for reducing the film tension is 0.2 to 1.5 seconds before cutting the film. 3. The method for replacing a film roll according to claim 1 or 2, wherein the means for reducing the film tension is a method for reducing the winding torque of the film. 4. Rotate the new core to a predetermined circumferential speed, bring the presser roller into contact with the surface of the running film, and as the film tension decreases, instantly transfer the presser roller to the core to bond the film and core surface. to fix the
The running direction of the film is deflected by the holding roller and the core, and the film stuck to the core is cut by the cutting blade, and the cut film is wrapped around the core, increasing the film tension and reaching a steady state. 2. The method for changing a film roll according to claim 1, wherein the operating means includes returning to the original position and, if necessary, stopping the rotation of the fully wound roll. 5. Immediately before cutting the film, a deflection means is provided to deflect the running direction of the film so that the film is fixed to the fixing agent of a new core and the film located downstream of the core is cut by the cutting blade. How to replace the equipped film roll. 6. The deflection means is either mechanical deflection such as a guide bar or dancer roll, or fluid deflection (film deflection by air jet, film deflection using air suction force, film deflection by fluid accompanying flow) ) The method for replacing a film roll according to claim 5. 7. A turret type winder for winding a film into a roll, comprising a core provided with a fixing agent over almost the entire length of the outer surface, and a turret arm capable of moving the core to a predetermined position and rotating the core. , a cutting blade fixed to an arm that can be positioned without contacting the film and the core, and a movable presser roller that can press the film against the core, and further comprising a film tension detection means, a film tension control means, and a timer. The film is equipped with a film that can be processed by predetermined programming to change the film tension and deflect the running direction of the film as the pressing roller is activated, to fix the film to the adhesive in the core, and to cut the film. Roll changing device.